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What is IPv6?

The explosive growth of the Internet has led to a rapid increase in the need for Internet
Protocol, or IP, addresses. An IP address is assigned to every device that connects to the Internet.

Currently, IP addresses fall under the IPv4 standard; however, IPv4 addresses are expected
to be exhausted sometime in the future. IPv6 is the successor and can support an exponentially larger number
of IP addresses than IPv4...more addresses than could ever be used.

What is AT&T’s Plan for IPv6?

AT&T has been planning for the IPv6 transition for several years, and we are on track for the
full transition. Here are some steps we’re taking:

Enabling our IP backbone network to support IPv6

Offering dual-stack IPv4/IPv6 services to enterprise customers since June 2009

Enabling our MIS and AVPN services to be IPv6-capable

Supporting IPv6 over domestic peering links

IPv4 and IPv6 will co-exist for a long time. This means existing Internet customers should see no
impact once this transaction begins. We have several methods in place to effectively manage the
transition to extend the life of existing networks:

Dual stack, which allows IPv4 and IPv6 to co-exist in the same devices and networks.

Tunneling, which allows IPv6 packets to be transmitted over an IPv4 infrastructure –
and vice-versa. When IPv6 becomes the more prevalent network this will not be required.

Translation, which allows IPv6-only devices to communicate with IPv4-only devices.

As AT&T officially began supporting IPv6 in 2011, it’s important to note
that the transition will be invisible to you. Our plans will enable you to continue to access the
Internet and your email without any change in your user experience.

Do I Need to be IPv6-“Ready” by a Certain Date?

No. The transition to IPv6 will roll out over a period of years. You will only need to be ready
when you attempt to access Internet content that happens to be available via IPv6 only. This may
not occur for several years and AT&T has you covered.

IPv6 Equipment Compatibility Table

This table shows the Operating Systems and AT&T provided modems, routers and gateways
that support IPv6. If you are using an operating system or device that is not shown, you will
need to upgrade your software and/or equipment in order to access content that is delivered
only over IPv6.

IPv6 compatible Operating Systems

Microsoft (PC)

Windows XP Service Pack 3 and above

Windows Vista

Windows 7

Windows 8

Macintosh (Mac)

OS 10.6.7 and above

Note: You may need to take steps to enable IPv6 for your IPv6 compatible
operating system. Contact the manufacturer for detailed instructions.

IPv6 compatible Modems, Routers, and Gateways

If you have one of the devices shown below, it will be IPv6-enabled through an automatic firmware update *.

AT&T DSL High Speed Internet

Devices supporting IPv6

Motorola 3360 (coming soon)

Netgear 6200

Netgear 7550

Pace 4111N

If you have any AT&T-provided device other than those listed above, and you want to
upgrade to an IPv6-capable device, Contact Us.

* For DSL customers who do not have one of the devices listed above,
IPv6-compatible devices are now available for purchase in the AT&T Equipment Shop.

AT&T U-verse High Speed Internet

2Wire 3600

2Wire 3800

2Wire 3801

Pace 5031

Pace 5168

2Wire/Pace i38HG (iNID)

2Wire/Pace i3812v (iNID)

Motorola NVG510

Arris NVG589

Arris NVG599

* Have a Motorola 2210 or 2Wire 2701 device and want to upgrade to an IPv6-capable device?
Contact us.

AT&T is prepared for IPv6 across our products, services, and network infrastructure for
all of our customers. Most customers will not need to take any action for IPv6 – AT&T
has you covered.
To learn more about IPv6, select
from the 5 topics below.

IPv6 BasicsMore Addresses for a Bigger Internet

In the future, the entire Internet ecosystem will transition to IPv6. AT&T is prepared
for this change across our products, services, and network infrastructure for all our customers. Most customers
will not need to take any action for IPv6 – AT&T has you covered.

IPv6 CompatibilityUpgrades are Coming

The transition to IPv6 won't affect your ability to access IPv4 content on the Internet. But as
IPv6 becomes more prevalent you'll want to evaluate the equipment in your computing environment to ensure that it is
IPv6-compatible. Most customers will not need to take any action for IPv6 – AT&T has you covered.
For a list of IPv6-compatible operating systems, modems, routers, and gateways, review our
compatibility matrix.

Test Now IPv6 Compatibility tool will test your system to see if you are IPv6 compliant
Start Test

AT&T Equipment ShopTechnology Ready

AT&T High Speed Internet customers with existing AT&T provided equipment will continue
to access the Internet just as they do today. For users with equipment that cannot support IPv6, new IPv6 devices
are available for purchase. Most customers will not need to take any action for IPv6 – AT&T has you covered.
Check if your equipment can support IPv6 and view available equipment by selecting your service type:

Every device and Web site on the Internet needs an address, knownas an Internet Protocol (IP) address,
in order to communicate.

The new address scheme (IPv6) will provide a virtually unlimited number of IP addresses.

The full transition to IPv6 will occur slowly.

Web sites you visit will appear the same, whether hosted by IPv4 or IPv6 addresses.

Existing devices and networks connected to the Internet will continue to work as they do now.

Preparing for IPv6

In the coming years, the entire Internet ecosystem will need to transition to IPv6. AT&T has already developed
and implemented plans to enable IPv6 across our products, services, and network infrastructure for all of our customers.

Residential and Small Business Internet Service Customers

You should not need to take any action to prepare for IPv6. Over time, new and replacement home modems, routers, and
gateways, peripherals, applications, and operating systems will be enabled to be IPv6 compatible.

Enterprise Networks and Applications

AT&T's IP backbone network supports IPv6 today, and we are offering enterprise services that support IPv6.